Sewing-machine.



PATENTED JAN. 9, 1906.

W. M. AMMBRMAN. SEWING MACHINE.

APPLIOATIOII FILED 001'. 7. 1904.

2 SHEETS-SHEET 1.

Smawtoz \Nh-W wi/bwema No. 809,600. PATENTED JAN. 9, 1906. W. M. AMMERMAN. SEWING MACHINE.

APPLICATION TILED 00w. 7. 1904.

2 SHBETSSHEET 2.

UNITED STATES PATENT OFFICE.

WVILLIAM M. AMMERMAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE EDWIN J. TOOF COMPANY, OF NEW HAVEN, CONNECTICUT, A COR- PORATION NEWV J ERSEY.

SEWING-MACHINE.

Patented Jan. 9, 1906.

T0 at whom it may concern:

'. Be it known that I, WiLLIAM M. AMMER- MAN, a citizen of the United States, and resident of New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification. 4

My present invention relates to improvements in sewing-machines, and more particularly to improvements in that class of sewing-machines embodying a rotary loop-taker and in'which a chain-stitch attachment is interchangeable with the usual bobbin and bobbin-case for rendering the machine capable of making either a'lock or chain stitch.

The object of the invention is to equip a machine of the class referred to, and more particularly a machine embodied in such class in which the loop-taker is in the form of a hook with an improved chain-stitch attachment that may be readily connected with and discontinued from the loop-taker.

To this end the invention consists in the novel features of construction and combination of parts, as hereinafter set forth in detail and pointed out in the claims.

Referring to the accompanying drawings, in which I have shown only so much of a sewing-machine as is necessary to illustrate my invention, Figure 1 is a front elevation of a rotary loop-taker and a portion of a needleplate with my improved chain-stitch attachment in operative connection therewith. Fig. 2 is a front elevation of the loop-taker with the chain-stitch attachment removed. Figs. 3, 4, and 5 are front, rear, and edge views, respectively, of the chain-stitch attachment removed from the loop-taker. Fig. 6 is a section through line 6 6 of Fig. 3. is a section through line 7 7 of Fig. 2, and

Figs. 8 to 12, inclusive, are front views of the loop-taker and connected chain-stitch attachment, showing the cooperation of the same with the needle at different times during the formation of a chain-stitch.

In the drawings, 1 indicates a rotary looptaker which, with the exception of certain changes to be hereinafter referred to, is substantially the same in construction and 0 eration as that used in the Wheeler & Wi son Fig.7.

sewing-machine No. 9, the same being provided with a loop-seizing beak 2, a heel 3, a chamber 4 for the reception of the bobbin and bobbin-case, and a groove 5 in the peripheral wall of said chamber to receive a flange on the non-rotary bobbin-case, all as in that of the said machine referred to. My improved chain-stitch attachment for use in connection with this loop-taker comprises a body portion 6 and aforked loop-holder 7, the latter being formed in the arc of a circle substantially conforming to that of the looptaker and being provided with an arm or shank 8, pivotally attached to the said body portion at the center thereof by a pivot 9. The attachment as thus formed is adapted to be interchangeable with the usual bobbincase and bobbin for use in connection with the looptaker, and to this end the body portioni6 is provided with a peripheral flange 10 for location in the groove 5 of the loop-taker and with an arm 11 for engagement with a recessed lug 12 on the under side of the needle-plate 13, the purpose of this engagement of the arm 1 1 with the lug 12 being to hold the body 6 against rotation with the loop-taker in the same manner as the bobbin-caseis held against rotation when it it used in said looptaker. While the body 6 of the chain-stitch attachment is thus held in a non-rotary position when in operative connection with the loop-taker, the forked loop-holder 7 is adapted to be so connected with the loop-taker as to be movable therewith, and this is accomplished in the present case by providing a suitable seat 14 on the loop-taker between its heel 3 and aprojection 15, adjacent thereto,

into which the shank 8 of the loop-holder is loosely seated when the attachment is placed in connection with the loop-taker. After the chain-stitch attachment has been placed in operative connection with the loop-taker in the manner described-thatis, the body 6 and the loop-holder shank 8, respectively, entered into the chamber 4 and seat 14 of the looptaker-it is desirable that it be removably secured in such connection whereby it may be interchangeable with the usual bobbincase, as hereinbefore referred to. For such purpose any suitable retaining means may be employed; but as a simple and effective means I have provided a retainer 16, which is pivotally connected at one end with the looptaker at 1'7 and is movable to and from a position to engage with a portion of the flange 10 of the body 6. IVith this retainer, when it is desired to place the attachment in connection with the loop-taker, the retainer will be swung outwardly from the loop-taker, as shown in Fig. 2, so as to open enough of the groove 5 to permit the insertion of the body 6 into position, after which the retainer will be swung back to its normal closed position to engage with the flange 10 of the said body 6 and removably retain the latter with the connected loop-holder in position. As a means for movably holding this retainer in its closed or operative position I have provided a latch device comprising an arm 18, pivoted at one end upon a suitable pivot, (shown in Figs. 2 and 7 as the loop-taker shaft 19,) and at its opposite end having a turned-up lip 20, which forms the latch proper and is adapted to engage with the retainer 16, this lip 20 being movable from a retainer-locking position, as shown in Fig. 1, to a retainer-releasing posi tion, as shown in Fig. 2. As a convenient means for operating the latch the latch-arm 18 is provided at its outer end with a knob 21, to be grasped by the operator.

The operation of the machine having my improved chain-stitch attachment applied thereto is as follows: The machine being set in motion to rotate the loop-taker and connected loop-holder and reciprocate the needle the said needle first descends, and as it rises it throws out a loop a of needle-thread, which is seized by the loop-taker beak 2, as shown in Fig. 8. Then as the loop-taker continues its rotation carrying with it the threadloop, one side of the latter is engaged by a shoulder 6 on the body 6 and guided thereby to a position at the rear of the said body, while the opposite side of the loop is caused by the cast-off surface 23 of the loop-taker to be passed across the face side of the said body 6, as indicated in Figs. 9 and 10. Upon the further rotation of the loop-taker the loop is cast off by the looptaker beak and drawn up by the takeup into engagement with the loop-holder proper, as shown in Fig. 11, the loop being capable of ready passage between the loop-taker and the loop-holder shank 8 when drawn up by the take-up by reason of the loose connection between said parts. Upon the continued rotation of the loop-taker from the position shown in Fig. 11 to that shown in Fig. 12, the forked loop-holder will be passed through the loop so as to hold the same in an open or distended condition across the path of movement of the needle to be entered by the latter upon its neXt descent, as shown in said Fig. 12. As the loop-taker now continues its rotation from the position shown in Fig. 12 to that shown in Fig. 8 the first loop will be cast off the loop-holder and the second loop thrown out by the needle is seized by the loop-taker beak and drawn through the first loop, which latter is subsequently drawn up and tightened in the work in the usual manner.

What I claim is- 1. In a sewing-machine, the combination with a rotary loop-taker, of a non rotary body ortion supported in position with a thread receiving space between it and said loop-taker and also having means for directing one side of a thread-loop engaged by the loop-taker into said thread-receiving space, and a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith.

2. In a sewing-machine, the combination with a rotary loop taker, of a non rotary body portion supported in position with a thread-receiving space between it and said loop-taker and also having means for directing one side of a thread-loop engaged by the loop-taker into said thread-receiving space, and a forked loop-holder pivotally attached to said body portion and also having connection with the loop-taker to be movable therewith.

3. In a sewing-machine, the combination with a rotary loop taker, of a non-rotary body portion supported by said loop-taker in position with a thread-receiving space therebetween and also having means for directing one side of a thread-loop engaged by the looptaker into said thread-receiving space, and a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith.

1. In a sewing-machine, the combination with a rotary loop taker, of a non-rotary body portion removably supported by said loop-taker in position with a thread-receiving space therebetween and also having means for directing one side of a thread-loop engaged by the loop-taker into said threadreceiving space, and a forked loop-holder at tached to said body portion and also having connection with the loop-taker to be movable therewith.

5. In a sewing-machine, the combination of a rotary loop-taker and a non-rotary body portion, the said loop-taker and body portion being provided, one with a groove and the other with a flange extending into said groove, and a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith.

6. In a sewing-machine, the combination of a rotary loop -taker and a non-rotary body portion, the said loop-taker and body portion being provided, one with a groove and the other with a flange extending into said groove, a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith, and a movable retainer for removably retaining said body portion in connection with the loop-taker.

7. In a sewing-machine, the combination of a rotary loop-taker having a groove, a nonrotary body portion having a flange extending into the groove of said loop-taker, a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith, and a movable retainer for engaging with the flange of said body portion to removably retain the latter in connection with the loop-taker.

8. In a sewing-machine, the combination of a rotary loop-taker having a groove, a nonrotary body portion having a flange extending into the groove of said loop-taker, a forked loop-holder attached to said body portion and also having connection with the loop-taker to be movable therewith, a pivoted retainer for engaging with the flange of said body portion to rer'novably retain the latter in connection with the loop-taker, and a latch for holding said retainer inoperative retaining position.

Signed at New York, in the county of New York and State of New York, this 3d day of October, A. D. 1904.

WILLIAM M. AMMERMAN.

Witnesses:

OHAs. F. DANE, E. M. FAITH. 

